86021559 has 48 divisors (see below), whose sum is σ = 142082304. Its totient is φ = 49766400.

The previous prime is 86021539. The next prime is 86021561. The reversal of 86021559 is 95512068.

It is a happy number.

86021559 is a `hidden beast` number, since 86 + 0 + 21 + 559 = 666.

It is not a de Polignac number, because 86021559 - 2⁵ = 86021527 is a prime.

It is a super-2 number, since 2×86021559² = 14799417225580962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86021539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133879 + ... + 134519.

It is an arithmetic number, because the mean of its divisors is an integer number (2960048).

Almost surely, 2^86021559 is an apocalyptic number.

86021559 is a deficient number, since it is larger than the sum of its proper divisors (56060745).

86021559 is a wasteful number, since it uses less digits than its factorization.

86021559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 86021559 is about 9274.7808060353. The cubic root of 86021559 is about 441.4373774776.

The spelling of 86021559 in words is "eighty-six million, twenty-one thousand, five hundred fifty-nine".